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Magmatic and Amygdaloidal Plagioclases
Published online by Cambridge University Press: 01 May 2009
Abstract
Thermal metamorphism of zeolites in amygdales of basaltic rocks is shown to give glomero-porphyroblastic aggregates of plagioclase crystals. Plagioclase phenocrysts in basic rocks are shown to undergo but little change during similar degrees of metamorphism.
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